Regulator for dynamo-electric machines



(No Model.)

J. H. IRWIN.

REGULATOR FOR DYNAMO ELECTRIC MACHINES. I N0-354'791-Peflifpfr-2-11i886- I iw . I l n y I --.I i l l l l l n l l l l. l u l ln l l s TVE TitTm RAM A @LX OMM/[Emu UNITED STATES PATENT OFFICE.

JOHN H. IRVIN, OF MORTON, PENNSYLVANIA.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 354,791, dated December2, 1886.

Application filed March 2, 1882.

To (LZZ whom, it may concern:

Be it known that I, JOHN H. IRWIN, of Morton, county of Delaware, andState of Pennsylvania, have invented certain new and useful Improvementsin Dynamo Electric Machines, of which the following is a full, clear,and exact description, reference being had to the accompanying drawing,and to the letters of reference marked thereon.

My invention relates especially to electric generators ordynamo-electric machines, and has for its object the production of adevice whereby the strength of the current generated is automaticallyregulated in order to supply only the energy required in the circuit.

My present invention consists in arranging the constituent parts of thegenerator in such a manner that the relative surface of action betweenthe armature and iield-of-force magnets may be automatically changed orvaried by a suitable apparatus located in the main or a shunt circuitand engaging with the shaft of the armature of the generator, wherebythe current is regulated, in the manner fully set forth in anapplication for Letters Patent for an improvement in dynamo-electricmachines filed by me February 25, 1882; and my invention involvescert-ain novel and useful combinations or arrangements of parts andpeculiarities of construction and operation, all of which will behereinafter first fully described, and then pointed out in the claims.

My invention herein consists in the method of regulating automaticallythe electro-motive force of a dynamo-electric generator and one of themeans by which the same may be accomplished.

The drawing presented herewith vshows an electric generator in sectionas constructed upon my improved plan, in connection with an electromotorwhich governs the position of the generator-armature.

Like letters of reference, wherever they 0ccur, indicate correspondingparts.

A are the exciting-magnets, constructed in the usual manner and woundwith bobbins B. C is the armature, and D is the elongated shaft thereof.E are the bearings therefor. F is the commutator, and f f are thebrushes.

G is the pulley for rotating the armature, said pulley being providedwith wide anges Serial No. 54,137. (No model.)

gl, which prevent the belt slipping therefrom when the shaft travels tothe right or left. A spline, I, playing in a groove, t', in thearmatureshaft, holds the pulley from turning thereon.

H are the helices of an electromotor, and .I is the armature, placed ina vertical position, the shaft T thereof running in bearings L. Upon theupper extremity of shaft T is located a centrifugal governor havingballs c, located upon arms b, connecting-links c passing from said armsto a grooved sliding collar, d. A forked lever, c, connected with collard, is fulcrumed at .71, and connected by means of a rod, k, to abell-crank, l, fulcrumed at M, and having a counterbalanee-arm, k',bearing weight 7a2. The other arm of bell-crankl is connected by a rod,m, to a clutch, a, upon armature-shaft D. The lnain 0r a shunt circuitoperates the motor.

lVhen constructed and arranged in accordance with the foregoingdescriptiomthe opera@ tion of my improved device is as follows: If thefull power of the generator is required, but a given current passesthrough the circuit of the governor motor, allowing the balls thereof tofall. Should the resistance in the circuit be decreased from any cause,such as turning out lamps, the strength of the current increases, givingmore rapid motion to the governor-motor, raising the lever actuating thebell-crank and drawing the armatureof the generator from the iield offorce of the eX- citing-magnets. As the current ofthe generator growsweaker, the armature will be automatically pushed into the field of theexcitingmagnets, thus'automatically increasing and decreasing thequantity of current generated in accordance with the demands of thecircuit.

Having now fully described iny invention, what I claim as new therein,and desire to sen cure by Letters Patent, is-

l. The method of automatically regulating the electro-motive force of adynamo-electric generator, which consists in varying the relativereacting surfaces of the inducing and induced parts of the generatorthrough the agency of the current generated by the Inachine, inaccordance with the variations in said current due to the requirementsof the circuit.

IOO

2. The combination, with a dynamo-electric generator having an armatureadapted to be drawn out of or pushed into the eld-of-force magnets, of acentrifugal governor adapted and arranged to draw out or push in sucha1'- mature, whereby the electro-motive force of the generator isautomatically regulated7 substantially as described.

3. In combination with a dynamo-electric generator, an electric motorand governor in the main or a shunt circuit, adapted and ar ranged todraw the armature out or push it into the eld-of-force magnets, wherebythe electro-motive force of the generator is automaticallyregulated,substantially as described.

4. In combination with a dynamo-electric machine having an armatureadapted to be drawn out of or pushed into the ield-oforce magnets, anelectric motor and governor in the main or shunt circuit, andbell-crank-lever have hereunto set my hand in the presence of 3 5 twowitnesses.

` JOHN H. IRWIN. Witnesses:

F. NV. HANAFORD, A. M. PIERCE.

